Cumulus 1.9.4 build 10993 updated. Some of the menu items with year choices will not display years beyond 2020. This will happen on manual generation of NOAA-style reports. The NOAA reports should continue to be automatically generated, but the capability to create them on demand will only work through 2020.
The new version of Cumulus, updated on 06 June 2020, allows date entries on NOAA reports and snow index up to the year 2099, from the year 2000 until the year 2099 (One hundred years). Download Cumulus 1.9.4 build 10993